Flex MMR affected by solo/duo MMR?

Long story short. I am a gold player ever since. After a break during S7 and most of S8, i returned to the game in the last months of S8, where i was placed G4 in solo/duo and i tried flex for the 1st time, where i was placed Iron4 (climbed to Iron 2 with a few games).

Season 9 starts, i put my focus in solo/duo, i get placed in Silver4 and i climb to G4 with 120-130 games. In the meantime i just played the flex placements (early in the seaon) and got placed bronze2. Now that i got gold in solo/duo, i decided to go back to flex to see how much i can climb. When i did that i had a win/loss of something like 8/13 (quite bad). BUT i gain 35 lp for wins and lose 6-7 lp from defeats. WIth 5-6 games i have skipped b1 promos (promoted straight to b1) and skipped also silver promos (promoted straight to Silver 4) and i still get 33-35 lp per win.

My solo/duo MMR is OKish (i get 21-23 for wins and lose 15-18).

Does my Flex MMR trying to get me to my solo/duo MMR, cause i do not see another reason why my flex mmr is so bloated

PS: I play Flex solo (no party)